Wheel slip boost function for a heavy-duty vehicle
AssigneeVolvo Truck Corporation
InventorsLeon Henderson, Ramadan Salif, Nikhil Baliga
Life of this patent
Estimating the term…
Abstract
A computer implemented method for controlling at least one driven and/or braked wheel of a heavy-duty vehicle. The method includes obtaining a motion request indicative of a desired longitudinal acceleration and/or longitudinal force associated with the vehicle, and configuring a wheel slip limit value indicative of a maximum allowable wheel slip by the at least one driven and/or braked wheel at a nominal value, and increasing the wheel slip limit value from the nominal value to a boost wheel slip value in response to detecting a boost signal, as well as controlling the at least one driven and/or braked wheel in dependence of the motion request and subject to the wheel slip limit value.
Claims18
A computer implemented method for controlling at least one driven and/or braked wheel of a heavy-duty vehicle, the method comprising:
- obtaining a motion request indicative of a desired longitudinal acceleration and/or a desired longitudinal force associated with the heavy-duty vehicle;
- configuring a wheel slip limit value at a nominal wheel slip limit value in dependence of an inverse tyre model, wherein the inverse tyre model represents a first relationship between wheel slip and wheel force at the wheel with a peak corresponding to maximum longitudinal force at an associated wheel slip value, wherein the wheel slip limit value is indicative of a maximum allowable wheel slip by the at least one driven and/or braked wheel, and wherein the nominal wheel slip limit value is determined with a margin to the peak of the inverse tyre model;
- and
- increasing a magnitude of the configured wheel slip limit value from the nominal wheel slip limit value to a boost wheel slip limit value in response to detecting a boost signal, thereby enabling operation in a non-linear region of the inverse tyre model and beyond the peak of the inverse tyre model,
- the method also comprising controlling the at least one driven and/or braked wheel in dependence of the motion request and subject to the configured wheel slip limit value,
- wherein said boost wheel slip limit value is greater than the nominal wheel slip limit value, and
- wherein said boost signal is generated in response to a determination that a wheel slip limit value beyond the nominal wheel slip limit value is desired.
A control unit for controlling at least one driven and/or braked wheel of a heavy-duty vehicle, the control unit comprising processing circuitry arranged to
- obtain a motion request indicative of a desired longitudinal acceleration and/or a desired longitudinal force associated with the heavy-duty vehicle, and
- configure a wheel slip limit value indicative of a maximum allowable wheel slip by the at least one driven and/or braked wheel at a nominal wheel slip limit value, and also increase the configured wheel slip limit value from the nominal wheel slip limit value to a boost wheel slip limit value in response to detecting a boost signal, thereby enabling operation in a non-linear region of the inverse tyre model and beyond the peak of the inverse tyre model and to control the at least one driven and/or braked wheel in dependence of the motion request and subject to the configured wheel slip limit value.
A heavy-duty vehicle comprising:
- a control unit for controlling at least one driven and/or braked wheel of a heavy-duty vehicle, the control unit comprising processing circuitry arranged to
- obtain a motion request indicative of a desired longitudinal acceleration and/or a desired longitudinal force associated with the heavy-duty vehicle, and
- configure a wheel slip limit value indicative of a maximum allowable wheel slip by the at least one driven and/or braked wheel at a nominal wheel slip limit value, and also increase the configured wheel slip limit value from the nominal wheel slip limit value to a boost wheel slip limit value in response to detecting a boost signal, thereby enabling operation in a non-linear region of the inverse tyre model and beyond the peak of the inverse tyre model and to control the at least one driven and/or braked wheel in dependence of the motion request and subject to the configured wheel slip limit value.
Dependencies are inferred from the claim text.